🧩 PP-TPO-T20 – Polypropylene / TPO + Talc 20%

(Technical hybrid olefinic material composed of Polypropylene (PP) and TPO (Thermoplastic Polyolefin) with 20% talc (T20))

🔹 What is PP-TPO-T20

PP-TPO-T20 combines the mechanical advantages of polypropylene with the olefinic elasticity of TPO, while the 20% talc addition provides controlled stiffening and dimensional stability at high temperatures. It is one of the most widely used materials for car bumpers, diffusers, guards, and lower protections, offering an optimal balance between elasticity, rigidity, and thermal stability. It is a very common variant in the automotive industry, used especially for large exterior parts where impact resistance, moderate flexibility, and low weight are required. Similar markings encountered include PP-TPO-T15, TPO-T20, and PP-TPO-TX20.

🔧 Composition

Component	Typical Proportion	Role
Polypropylene (PP)	55–65 %	Rigid structural matrix
TPO (Thermoplastic Olefin)	15–25 %	Elasticity, impact resistance
Talc (T20)	20 %	Stiffening and dimensional stabilization
Additives	< 5 %	UV protection and exterior finishing

🚗 Automotive Applications

Component	Example parts	Observations
Bumpers / Lower Diffusers	Corners, extensions, grilles	Semi-flexible, UV stable
Engine shields / Under-guards	Under-engine protections, panels	Rigid-elastic, matte
Wheel Arches	Fender liners, side housings	Lightweight, shock resistant
Large Exterior Elements	Sill covers, side trims	Good thermal stability

🔩 Welding Compatibility

Mating Material	Compatibility	Observations
PP-TPO, PP-EPDM, TEO, TPO-T20	✅ Excellent	Excellent welding – common family
Plain PP, PP-TD20, PP-TX20	⚠️ Fair	Partially compatible, but usable
TPE-O, TPE-V	⚠️ Limited	Possible with careful temperature control
PA, PC, ABS, PET, PVC	❌ Incompatible	Thermally and chemically incompatible

🏭 Manufacturers and Trade Names

• LyondellBasell: Hostacom® PP-TPO-T Series (T20)
• Borealis AG: Daplen® PP-TPO-T20 / Softell®
• SABIC: PP-TPO-T20 Compound
• Röchling Automotive: RoeBlend® PP-TPO-T20

🧠 How to Identify

• Markings: >PP-TPO-T20<, >TPO-T20<, >PP-TPO-TX20<
• Texture: Matte, soft, rubberized, dense
• Density: ~1.02–1.04 g/cm³
• Flame Test: Clean flame, faint olefinic smell, grey ash (talc)
• Slightly flexible, does not snap suddenly when bent

🛠️ PP-TPO-T20 Welding at ReplastMD

Method	Temperature	Observations
Hot Air	230 – 250 °C	Recommended – TPO or PP-EPDM rod
Heat plate (Mirror)	220 – 240 °C	Uniform, clean bonding
Extrusion	230 – 250 °C	For thick parts or long cracks

💡 ReplastMD Recommendation: use TPO or PP-TPO welding rods, clean the surface with isopropyl alcohol, and maintain a constant air flow.